some assembly refactorings

Author: Roxxik

kernel/asm/bootsector.asm

@@ -1,4 +1,5 @@
 ORG 0x7C00
+SECTION .text
 USE16
 
 boot: ; dl comes with disk

kernel/asm/initialize.asm

@@ -1,5 +1,6 @@
 SECTION .text
-[BITS 16]
+USE16
+
 initialize:
 .fpu: ;enable fpu
     mov eax, cr4

kernel/asm/interrupts-i386.asm

@@ -15,8 +15,9 @@ struc IDTEntry
     .offseth resw 1
 endstruc
 
-[section .text]
-[BITS 32]
+SECTION .text
+USE32
+
 interrupts:
 .first:
     mov [.entry], byte 0
@@ -69,7 +70,7 @@ interrupts:
 .entry: dd 0
 
 idtr:
-    dw (idt_end - idt) + 1
+    dw (idt.end - idt) + 1
     dd idt
 
 idt:
@@ -108,4 +109,4 @@ iend
     iend
 %assign i i+1
 %endrep
-idt_end:
+.end:

kernel/asm/interrupts-x86_64.asm

@@ -18,8 +18,8 @@ struc IDTEntry
 	.reserved resd 1
 endstruc
 
-[section .text]
-[BITS 64]
+SECTION .text
+USE64
 interrupts:
 .first:
 	mov [.entry], byte 0
@@ -94,7 +94,7 @@ interrupts:
 .entry: dq 0
 
 idtr:
-    dw (idt_end - idt) + 1
+    dw (idt.end - idt) + 1
     dq idt
 
 idt:
@@ -139,4 +139,4 @@ iend
 	iend
 %assign i i+1
 %endrep
-idt_end:
+.end:

kernel/asm/memory_map.asm

@@ -1,5 +1,5 @@
 SECTION .text
-[BITS 16]
+USE16
 ;Generate a memory map at 0x500 to 0x5000 (available memory not used for kernel or bootloader)
 memory_map:
 .start  equ 0x0500

kernel/asm/print16.asm

@@ -1,7 +1,7 @@
-; provide function for printing in x86 real mode
-
 SECTION .text
 USE16
+; provide function for printing in x86 real mode
+
 
 ; a newline
 newline: db 0xD, 0xA, 0

kernel/asm/startup-common.asm

@@ -1,3 +1,6 @@
+SECTION .text
+USE16
+
 startup:
     ; enable A20-Line via IO-Port 92, might not work on all motherboards
     in al, 0x92

kernel/asm/unreal.asm

@@ -1,3 +1,6 @@
+SECTION .text
+USE16
+
 ; switch to unreal mode; ds and es can address up to 4GiB
 unreal:
     cli

kernel/asm/vesa.asm

@@ -1,6 +1,6 @@
 %include "asm/vesa.inc"
-[section .text]
-[BITS 16]
+SECTION .text
+USE16
 vesa:
 .getcardinfo:
     mov ax, 0x4F00